Full trail is a downpayment on registration (closing the sale loophole) which is downpayment on fees and confiscation in future. The FFL thing itself was a initially a big reach, now guns not sold through these federally licensed dealers is a "loophole".

The incremental nature of gun control in the US can be measured in terms of the effect of the late-game steps, not the meaningless controls it takes on the way there.